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(11)

EP 2 847 457 A1

(12)

(43) Date of publication: 18.03.2015 Bulletin 2015/12 (21) Application number: 13722983.7 (22) Date of filing: 10.05.2013

(51) International Patent Classification (IPC):  F03D 7/02(2006.01) F03D 9/00(2006.01) F03D 7/04(2006.01) (86) International application number: PCT/DK2013/050138 (87) International publication number: WO 2013/167141 (14.11.2013 Gazette 2013/46)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME (30) Priority: 11.05.2012 DK 201270246 25.06.2012 US 201261663991 P (71) Applicant: Vestas Wind Systems A/S 8200 Aarhus N (DK)	(72) Inventor: TARNOWSKI, Germán Claudio DK-2830 Virum (DK) (74) Representative: Vestas Wind Systems A/S  Patents Department Hedeager 44 8200 Aarhus N 8200 Aarhus N (DK)